Problems activating waspmote 3G Module, UART Noise

Wireless communications in Waspmote, topologies, node types...
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Joined: Tue Apr 16, 2019 10:03 am
Company: UP GmbH

Problems activating waspmote 3G Module, UART Noise

Post by up_nf » Tue Apr 16, 2019 11:40 am

We build a data logger with waspmote + SIM5215E 3G module. The logger worked fine but then stopped sending data some day.

On site with the USB cable attached we got the message

Code: Select all

[PWR] Noise in Interruption line
just before the program entered the deepSleep.

When waking up again the waspmote was not able to activate the 3G Module with _3G.ON()
This stopped the data transmission apparantly. The rest of the code worked fine.

We have attached the battery, solar module and one single analog sensor on Gnd, 3V3 SENSOR and Analog 6 on the small 6x2Pin Connector.

We couldn't solve the issue by pressing the reset button. Switching the on/off switch and waiting a bit enabled data transmission again though. With this also the message about the noise in the interrupt line disappeared.

Is there static building up that causes this noise and makes the communication to the 3G module impossible? Can we take any counter measures to prevent that?

Thank you very much for some help!

Posts: 27967
Joined: Mon Sep 28, 2009 1:06 pm

Re: Problems activating waspmote 3G Module, UART Noise

Post by libelium-dev » Wed Apr 17, 2019 9:31 am


What API are you using? What code did you upload to the node? Did you try with the last API v040?

Maybe there is an interference in the UART bus caused by the 3G module since the another devices don't use the uart.


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